Carbureter.



T. J. DISTURNAL.

CARBURETER. APPLICATION FILED FEB. Is, 1915.

LQQGAW'QD Patented Ma /15, 191?.

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[man o/ E, (140 Mia 7m THOMAS JOHN DISTURNAL, 0F BELMONT, IRELAND.

cameraman.

Specification of Letters Patent. I

Patented May 115, Jltliiltl.

Application filed February 15, 1915. Serial No. 8,301.

To all whom it may concern:

Be it known that I, THOMAS JOHN DIS- TURNAL, a subject of His Majesty the King of England, residing at Belmont, in the county of Kings, Ireland, have invented certain new and useful Improvements in Carbureters for Internal-Combustion Engines, of which the following is a specification.

This invention relates to improvements in or rbureters for internal combustion engines of the type comprising a plurality of fuel nozzles mounted in a casing and connected to a common source of fuel supply, and having their outlet ends extending into an equal number of carbureting or choke tubes or holes also in the casing and a valve mounted between said tubes or holes and the induction pipe of the engine, and adapted to open and close said tubes or holes in succession to control the supply of explosive mixture to the engine.

The important feature of the invention is that the choke tubes or holes and the nozzles are controlled by means of one or more flat plate valves provided in addition to, and

adapted to be operated in conjunction with an ordinary butterfly or other suitable main throttle valve, which last-mentioned valve would be completely closed if it is desired between the same and the outlet of the carbureter, and is adapted to slide, is not slotted and is formed solid and plain with the exception of a notch and a cut away portion at one end thereof, or is adapted to turn in its own horizontal plane and is formed with slots, which notch and cut away portion, or the slots, insure the proper opening of the choke tubes or holes-and are adapted to only partly cover a pilot tube when the valve is in its closed or normal position.

A further feature of the invention is that the choke tubes are provided as distinct holes drilled or formed in a solid and separate plate, bar or block which is fitted within the carburetor casing.

The invention is hereinafter described with reference to the accompanying drawings, in which:

Figure 1 is a partly sectional elevation of a carbureter constructed in accordance with the invention.

Fig. 2 is a plan on the line 22 of Fig. 1

Fig". 3 is a plan of the nozzles and fuel supply box.

Two or more fuel nozzles a, preferably a large number, are disposed within a casing 6 into which cold atmospheric air, filtered or otherwise, or air under pressure, and hot air are admitted through one or more suitable ports 0 and 0 respectively, valve controlled or otherwise,and a corresponding number of choke or carbureting tubes d are positioned above the nozzles a and also Within the casing, preferably so as to surround the discharge ends of said nozzles.

A fiat controlling valve or plate e is mounted within the casing 12 between an outlet f formed in the latter leading to the pipe 9 adapted for connection to the induction pipe 9 and the tubes cl and is adapted to be moved in such manner so that it operates in conjunction with a butterfly or other suitable main throttle valve in the pipe The valve 6 is mounted so as to rest directly upon the tubes d and thus leave no air space between said valve and the tubes.

The nozzles a are preferably fitted on a common fuel supply pipe or box it mounted within or on the casing I) while the choke or carbureting tubes of are formed by holes drilled in a solid and separate aluminium or other block 2' and suitably shaped, said block til being secured within said casing so that the lower ends of the holes surround the ends of the nozzles, and provided with an ear I.

The tubes or holes (Z are preferably graduated in size as shown and so arranged that the pilot nozzle at 5 and the smallest tube or hole at 6 are opened first by the movement 'of the valve 6 and so on to the largest throughout the series. If desired, the nozzles may also be graduated in size.

The butterfly or other suitable main throttle valve mounted in the pipe 9 is secured on a spindle it on which is fixed a lever connected to any suitable hand or automatic controlling and operating device and connected to the ear I by means of a pivoted The fuel supply box it is shown fitted with a filter m made of fine metal wire gauze or other suitable material and is adapted to be connected to a float feed or other suitable fuel chamber or reservoir at a.

When the apparatus is in use, one, two or more of the choke or mixing tubes or holes can be more or less opened by moving the valve 6 and opening the butterfly or other main valve thus enabling the suction of the engine to draw through the opened tube or tubes the required quantity of fuel from the corresponding nozzle or nozzles and of air from the lower part of the casing. Thus, if the engine is required to run slowly the valve 6 would be moved and the main valve opened so that the small pilot nozzle only would be subjected to the suction; if it is required to develop more power and a greater speed the valve 6 would be further moved and the main valve further opened so that two or three nozzles would each have the full suction exerted upon it, but if it is required to run the engine very fast and to develop its maximum power the valve 6 may be moved and the main valve opened further so that the suction would be spread over four, five, six or more nozzles according to the number fitted. It will readily be seen therefore that by the judicious manipulation of the valve 6 and the main valve and the series of choke tubes and nozzles the suction or air depression can be kept constant on said choke tubes and nozzles for various engine speeds, thus assuring a uniform and by Letters Patent in the United States is 2-1 1. A carbureter comprising in combination a substantially rectangular casing provided with a circular extension, a throttle valve mounted in said extension, means for operating said throttle valve, a fuel chamber in said casing, a plurality of fuel supply nozzles communicating with said chamber and extending through the open part of said casing, the said nozzles being arranged in non-alining transverse series across the easing, a partition above said nozzles provided with a series of non-alining transverse openings adapted to aline withsaid nozzles and order to regulate the mixture through the carbureter.

2. A carbureter comprising in combination a casing, a fuel reservoir in the casing, a plurality of openings formed in the casing, sald openings being arranged in non-alining transverse series across said casing and communicating with a common air supply passage, a plurality of nozzles communicating with the fuel reservoir, the upper ends of the nozzles extending into the openings, the latter being of greater diameter than the diameter of the upper ends of the nozzles to form air passages, a flat slidable valve mounted snugly over the openings and provided with a cut out portion adapted to uncover a portion of one of said series of open.- ings, means for mounting the valveto prevent the suction of the engine lifting said valve, whereby to seal the openings covered by the valve, means for operating the valve to successively uncover the openings to ad-' mit mixture through the openings, a pipe rality of vertical openings communicating with the air passage, said openings bemg arranged in non-alining transverse series across sald casing, a plurality of nozzles commumcatmg with the fuel chamber and mounted in the air passage and extending into the lower ends of the'openings, a reciprocal fiat valve snugly fitted over the openings and provided with a cut out portion adapted to uncover a portion of one of said series of openings at all times, means for mounting-the valve to prevent the suction of the engine lifting said valve, whereby to insure the sealing of the openings when moved over same, means for reciprocating the valve to successively uncover the openmgs, a pipe having a tapered mouth communicating with the casing directly above the valve and the openings in the casing, a throttle valve in said pipe, and means connecting the throttle valve and the fiat valve to cause simultaneous movement of said valves. 

